[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fnIsgO0kdEixBpyK4UL1X0UCh_QaLytJyxLNF2-vhRk4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-06-24 17:29:48",207662648,[8,9,10,11],"过渡带越窄","过渡带越宽","过渡带内外波动越大","过渡带内外波动越小",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},33,"4f36811c288c7560dd993c21cd7e4cbb","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc9ea06a7b4bd1b577403538074fccb32.png","数字信号处理","484434cf77a1473fbc1106f2c6a5fd36","作业一","窗函数的主瓣宽度越小,用其设计的线性相位FIR滤波器的()",[21,32,41,50,59,68,76,85,94,103],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],207662639,[25,26,27,28],"零极点调整容易","运算速度快","各级的误差互不影响","总误差低于级联型的总误差","()不是并联型实现IIR滤波器的优点","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],207662640,[36,37,38,39],"可单调滤波器的极点和零点","每个基本节有相同的结构","可灵活地进行零极点配对和交换级联次序","误差不会逐级积累","()不是级联型实现IIR滤波器的优点",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],207662641,[45,46,47,48],"脉冲响应不变法","双线性变换法","窗函数法","频率采样法","()方法设计的IIR数字滤波器会造成频率的非线性",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],207662642,[54,55,56,57],"就是幅频特性","函数值总是大于0","函数值可正可负","函数值是常数,与频率无关","FIR滤波器的幅度函数()",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],207662643,[63,64,65,66],"相位特性是常数","相位特性是频率的一次函数","相位特性是频率的二次函数","相位特性不是频率的函数","FIR滤波器的线性相位特性是指()",{"answer":69,"createTime":5,"id":70,"options":71,"question":75,"source":30,"type":31},[],207662644,[72,73,9,74],"阻带衰减越大","通带波纹越大","阻带波纹越大","巴特沃斯滤波器阶数越高,则()",{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":30,"type":31},[],207662645,[80,81,82,83],"逼近误差值在阻带内等幅地在极大值和极小值之间摆动","具有阻带内等波纹的幅频特性","具有通带内等波纹的幅频特性","过渡带具有频响趋于斜率为-3N倍频程的渐近线","不是阶数为N的Chebyshev滤波器的特点之一是",{"answer":86,"createTime":5,"id":87,"options":88,"question":93,"source":30,"type":31},[],207662646,[89,90,91,92],"无混频,相位畸变","无混频,线性相位","有混频,相位畸变","有混频,线性相位","冲激响应不变法设计数字滤波器的特点是()",{"answer":95,"createTime":5,"id":96,"options":97,"question":102,"source":30,"type":31},[],207662647,[98,99,100,101],"归一化函数","反归一化函数","全通函数","线性函数","从低通数字滤波器到各种数字滤波器的频率变换要求对变换函数u⁻¹=G(z⁻¹)在单位圆上是()",{"answer":104,"createTime":5,"id":6,"options":105,"question":19,"source":30,"type":31},[],[8,9,10,11]]